1
|
Bérangère C, Kevin A, Tatiana R, Olivier E. Two- and three-dimensional symmetry of maxillary incisors: A clinical study. J ESTHET RESTOR DENT 2024. [PMID: 39103316 DOI: 10.1111/jerd.13294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Revised: 07/21/2024] [Accepted: 07/23/2024] [Indexed: 08/07/2024]
Abstract
OBJECTIVE To assess the 2D and 3D natural symmetry of the maxillary incisors. MATERIALS AND METHODS Maxillary alginate impressions were taken of 59 young adult volunteers. Gender, orthodontic treatment history, and dominant hand were collected. For 2D analysis, a digital caliper was used for measurements on maxillary casts. For 3D analysis, the casts were scanned using a lab scanner, and the labial surface symmetry of contralateral incisors was evaluated. Mann-Whitney tests and Student's t-test were performed, α = 0.05. RESULTS Results indicated a lack of identical lengths among contralateral central or lateral incisors, with minimal occurrences of identical width measurements. 68% of central incisors and 73% of lateral incisors showed differences in length exceeding 0.2 mm. Central incisors showed more similarities than lateral incisors in width, with 61% central incisors and 47% lateral incisors having differences under 0.2 mm. The differences between highly asymmetrical contralateral teeth are situated at the transitional lines. The influence of sexual dimorphism, orthodontic factors, and the dominant hand on incisors' symmetry was not statistically significant. CONCLUSIONS 2D and 3D symmetry of the natural maxillary incisors are rare. 3D symmetry remains consistent across orthodontic treatment status, gender, and dominant hand, suggesting its independence from such parameters. CLINICAL SIGNIFICANCE To achieve a natural and aesthetic smile rehabilitation, the symmetry of the maxillary incisors must be well understood. In our study, 2D and 3D symmetry of the maxillary incisors occurred rarely, but central incisors showed more similarities than lateral incisors in width, with differences under 0.2 mm. On the other hand, differences between highly asymmetrical contralateral teeth are situated at the transitional lines. These conclusions should be included in further computer-assisted three-dimensional smile designs.
Collapse
Affiliation(s)
- Cournault Bérangère
- Robert Frank Faculty of Dental Surgery, Strasbourg, France
- Inserm UMR 1121, Biomaterials and Bioengineering, Strasbourg, France
| | - Azran Kevin
- Robert Frank Faculty of Dental Surgery, Strasbourg, France
| | - Roman Tatiana
- Robert Frank Faculty of Dental Surgery, Strasbourg, France
- Inserm UMR 1121, Biomaterials and Bioengineering, Strasbourg, France
| | - Etienne Olivier
- Robert Frank Faculty of Dental Surgery, Strasbourg, France
- Inserm UMR 1121, Biomaterials and Bioengineering, Strasbourg, France
- Private practice, Strasbourg, France
| |
Collapse
|
2
|
Cinelli F, Piva F, Bertini F, Russo DS, Giachetti L. Maxillary Anterior Teeth Dimensions and Relative Width Proportions: A Narrative Literature Review. Dent J (Basel) 2023; 12:3. [PMID: 38248211 PMCID: PMC10814795 DOI: 10.3390/dj12010003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 01/23/2024] Open
Abstract
Predictable results in the aesthetic treatment of anterior teeth can be obtained by resorting to the concept of dental aesthetics and, in particular, defining the ideal tooth dimensions and proportions to obtain a harmonious smile. Considering the great variety of articles dealing with the topic, and the lack of updated reviews, this narrative literature review aims to evaluate current knowledge on anterior teeth dimensions and to verify the existence and the potential applications of the anterior teeth proportioning theories (Golden Proportion, Golden Percentage, RED Proportion, and Golden Rectangle). PubMed, Embase, Cochrane Library, and Google Scholar databases were comprehensively searched using different keywords and term combinations. The research includes articles published up to June 2023, no time limits were set, and only articles in English were included. Inclusion criteria comprehended reviews, clinical studies, and in-vitro studies. A total of 66 articles were selected. Two main topics were identified: "Anterior teeth dimensions", "Golden Proportions, Golden Percentage, RED Proportions, and Golden Rectangle". As far as tooth dimensions are concerned, different width ranges are recognized for men and women and for different ethnic groups. Perfectly symmetric contralateral elements are found in low percentages of subjects. The correlation between dental dimensions and facial parameters is not always present, and it strongly depends on the sample's ethnicity and gender. Ideal tooth proportions were only partially identified.
Collapse
Affiliation(s)
| | | | | | | | - Luca Giachetti
- Unit of Dentistry, Department of Experimental and Clinical Medicine, University of Florence, Via del Ponte di Mezzo, 48-50127 Firenze, Italy; (F.C.); (F.P.); (F.B.); (D.S.R.)
| |
Collapse
|
3
|
Danko M, Chromy L, Ferencik N, Sestakova M, Kolembusova P, Balint T, Durica J, Zivcak J. Literature Review of an Anterior Deprogrammer to Determine the Centric Relation and Presentation of Cases. Bioengineering (Basel) 2023; 10:1379. [PMID: 38135970 PMCID: PMC10740564 DOI: 10.3390/bioengineering10121379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/26/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023] Open
Abstract
The increasing demand for dental aesthetics, articulation corrections, and solutions for pain and frequent bruxism demands quick and effective restorative dental management. The biomedical research aimed to create a beneficial, ecological, and readily available anterior deprogrammer to determine the centric relation (CR) of cases. This medical device is additively manufactured from a biocompatible material. Size is customizable based on the width of the patient's anterior central incisors. This is a pilot study with two subjects. The task was to develop a complete data protocol for the production process, computer-aided design (CAD), and three-dimensional (3D) printing of the anterior deprogrammers. The research focused on creating simple and practically applicable tools for the dentist's prescription (anterior deprogrammer in three sizes), and secondly for the communication between the dentist and the patient (computer application). The tested hypothesis was whether, according to these novel tools, it is possible to produce functional occlusal splints, which could be manufactured using current technologies. This study compared a traditional splint with a digitally designed and 3D-printed one. The tested hypothesis was whether manufactured occlusal splints differ in patients' subjective perception of comfort. Each conservative treatment was monitored for ten weeks. Initial results are promising; no statistically significant difference was found between the productive technologies.
Collapse
Affiliation(s)
- Maria Danko
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, 04200 Kosice, Slovakia; (L.C.); (N.F.); (P.K.); (T.B.); (J.Z.)
| | - Lubos Chromy
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, 04200 Kosice, Slovakia; (L.C.); (N.F.); (P.K.); (T.B.); (J.Z.)
| | - Norbert Ferencik
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, 04200 Kosice, Slovakia; (L.C.); (N.F.); (P.K.); (T.B.); (J.Z.)
| | - Marcela Sestakova
- 1st Department of Stomatology, Faculty of Medicine, Pavol Jozef Safarik University in Kosice, 04154 Kosice, Slovakia; (M.S.); (J.D.)
| | - Petra Kolembusova
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, 04200 Kosice, Slovakia; (L.C.); (N.F.); (P.K.); (T.B.); (J.Z.)
| | - Tomas Balint
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, 04200 Kosice, Slovakia; (L.C.); (N.F.); (P.K.); (T.B.); (J.Z.)
| | - Jaroslav Durica
- 1st Department of Stomatology, Faculty of Medicine, Pavol Jozef Safarik University in Kosice, 04154 Kosice, Slovakia; (M.S.); (J.D.)
| | - Jozef Zivcak
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, 04200 Kosice, Slovakia; (L.C.); (N.F.); (P.K.); (T.B.); (J.Z.)
| |
Collapse
|
4
|
Alaghbari SSA, Mohmmed BSA, Alalwani NNM, Sobhy MM, Qadi KA, Khawaji SA, Mhbob HO, Alsadi FM, Moaleem MMA. Analysis of the Facial Measurements and Dental Arch Dimensions for the Construction of Dental Prostheses among Adult Yemenis. J Contemp Dent Pract 2023; 24:595-604. [PMID: 38193184 DOI: 10.5005/jp-journals-10024-3511] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
AIM To investigate the dental arch dimension (width, length, and height) and facial measurements including inner-canthal width (ICW), bizygomatic width (BZW), inter-alar width (IAW), and mouth width (MW), and to assess the correlation between these facial measurements and dental arch width (canine width [CW], inter-first premolar width [I1PW], and inter-first molar width [I1MW]), to establish a preliminary reference for artificial teeth selection in Yemeni adult. MATERIALS AND METHODS The study included 80 individuals (40 males and 40 females) with symmetrical faces and normal class I occlusion ranging in age from 20 to 35. Maxillary and mandibular stone casts were made for each individual. The dimensions of dental casts and facial measurements, including ICW, BZW, IAW, and MW, were assessed using a digital caliper. The collected data were analyzed by using the SPSS software program. The descriptive statistics for each measurement were made. Differences between males and females were tested using an independent-sample t-test with p-values below 0.05 considered significant. Pearson correlation coefficient between facial measurements and dental arch width was also done. RESULTS Most dental arch dimensions and facial measurements exhibited larger mean values in the male than in the female group, with the greatest significant difference in the maxillary dental arch width and the lowest in mandibular dental arch length. A highly significant correlation is observed between ICW and maxillary canine width (CW) (r = 0.318, p = 0.004). In contrast, no significant correlation between dental arch width and BZW, IAW, and MW is shown. CONCLUSIONS Within this study's limitations, the ICW can determine the ideal dimension of the artificial teeth in the anterior maxillary arch. While the other facial parameters, including BZW, IAW, and MW, cannot be used for artificial teeth selection in Yemeni populations. CLINICAL SIGNIFICANCE The findings of this study established a reference database of facial measurements and their correlation to dental arch and teeth width in Yemeni populations. So, it can be implemented in artificial teeth and dental prostheses design and construction.
Collapse
Affiliation(s)
- Samar Sadeq Abdulrahman Alaghbari
- Department of Prosthodontics, College of Stomatology, Xi'an Jiaotong University, Xi'an, China; Department of Prosthodontics, College of Dentistry, Al-Hikma University, Sana'a, Yemen, Phone: +86 13201766120, e-mail: , Orcid: https://orcid.org/0009-0005-8500-5672
| | - Badea Saeed Abdu Mohmmed
- Department of Prosthodontics, Faculty of Dentistry, Sana'a University, Sana'a, Yemen, Orcid: https://orcid.org/0009-0006-4570-2702
| | - Nadhra Nasser Masood Alalwani
- Department of Prosthodontics, Faculty of Dentistry, Sana'a University, Sana'a, Yemen, Orcid: https://orcid.org/0009-0003-3943-1123
| | - Mohamed M Sobhy
- Department of Prosthetic Dental Science, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Khawla Ahmed Qadi
- Department of Dental Interns, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Salma Arar Khawaji
- Department of Dental Interns, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Hasan Oh Mhbob
- Administration Health, Advance Technology Dental Research Center, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fahad M Alsadi
- Administration Health, Advance Technology Dental Research Center, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed M Al Moaleem
- Department of Prosthetic Dental Science, College of Dentistry, Jazan University, Jazan, Saudi Arabia; Faculty of Dentistry, University of Ibn al-Nafis for Medical Sciences, Sana'a, Yemen
| |
Collapse
|
5
|
Pisulkar S, Nimonkar S, Bansod A, Belkhode V, Godbole S. Quantifying the Selection of Maxillary Anterior Teeth Using Extraoral Anatomical Landmarks. Cureus 2022; 14:e27410. [PMID: 36051727 PMCID: PMC9419898 DOI: 10.7759/cureus.27410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 07/28/2022] [Indexed: 11/18/2022] Open
Abstract
Background: Regardless of skin color, age, sex, or other factors, all beautiful faces follow the divine proportion. Proportions of face components appear to play a role in facial attractiveness. Aim: The study determines the correlation between the mesiodistal width of anterior maxillary teeth, inter-canthal distance, inter-alar distance, and inter-commissural distance as a criterion for selecting anterior maxillary teeth. Material and Methods: A cross-sectional study was carried out at the institutional level with a sample size of 200 participants with 100 male and 100 female participants. Inter-canthal distance, inter-alar distance, and inter-commissural distance were measured using the digital caliper and a customized silver scale to measure the mesiodistal width of anterior maxillary teeth. The data obtained were analyzed using Statistical Package for Social Sciences (SPSS) version 24.0 (IBM Corporation, Chicago, USA). Pearson's correlation test calculated the correlation coefficient, and the level of significance was kept at p<0.05. Result: The width of the maxillary anterior and the inter-canthal gap showed a strong positive correlation, the inter-alar difference and the mesiodistal width of anterior teeth showed a moderately positive correlation, and the estimated inter-commissural width and the mesiodistal width of anterior teeth showed a strong positive correlation (p<0.05). Conclusion: These parameters are correlated to the dimensions of the tooth size and can act as a guide while selecting the teeth for future rehabilitation treatment when the natural teeth are lost.
Collapse
|
6
|
Mota-Júnior SL, Gasparello GG, Pithon MM, Tanaka OM. Efficiency and side effects of a novel method for maxillary central root torque with round wire compared with the conventional rectangular wire. Questions about applicability? Am J Orthod Dentofacial Orthop 2022; 162:e1-e2. [PMID: 35772877 DOI: 10.1016/j.ajodo.2022.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/01/2022] [Indexed: 11/18/2022]
Affiliation(s)
| | | | - Matheus Melo Pithon
- Juiz de Fora, Minas Gerais, Curitiba, Paraná, Jequié, Bahia, and Curitiba, Paraná, Brazil
| | | |
Collapse
|
7
|
Subjective and Objective Evaluation of the Symmetry of Maxillary Incisors among Residents of Southwest Poland. Symmetry (Basel) 2022. [DOI: 10.3390/sym14061257] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Dental aesthetics is an essential factor affecting people’s psychosocial wellbeing. One of the most critical components of an aesthetic smile is symmetry within the dentition. Dentists and orthodontists, unlike laypersons, are critical in assessing dental aesthetics. This study aimed to evaluate the accuracy of patients’ assessment of the symmetry of their maxillary incisors and some factors that influence it. The study was conducted on 83 participants aged from 11 to 39 years. First, the participants filled out a questionnaire to obtain patients’ opinions of the symmetry of their upper incisors. This stage was followed by an intraoral examination, during which we used a digital caliper to measure the width of four maxillary incisors. The data were entered into STATISTICA v. 13.3. The following conclusions were drawn from the study. First, the respondents were generally able to determine the asymmetry of the incisors. Second, among the maxillary incisors, the participants defined the symmetry of maxillary central incisors more accurately than the maxillary lateral incisors. The cut-off value for incisor asymmetry noticeable to a layperson is 0.2 mm for maxillary medial incisors and 0.55 for maxillary lateral incisors. Third, we found no dependence of the accuracy of the assessment of incisor asymmetry on the age of the subjects; however, in our study group, the age range (spread) was not significant, so further studies are recommended. Finally, results concerning the relationship with gender showed that males assess the level of symmetry of their maxillary incisors more accurately than females.
Collapse
|
8
|
Chander NG. Prudential analysis of methods in the selection of teeth for complete denture. J Indian Prosthodont Soc 2021; 21:215-216. [PMID: 34380807 PMCID: PMC8425374 DOI: 10.4103/jips.jips_230_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- N Gopi Chander
- Editor, The Journal of Indian Prosthodontic Society, Chennai, Tamil Nadu, India
| |
Collapse
|
9
|
Direct Esthetic Composite Restorations in Anterior Teeth: Managing Symmetry Strategies. Symmetry (Basel) 2021. [DOI: 10.3390/sym13050797] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A novel procedure for symmetric and consistent layer thickness management in esthetic direct restoration of anterior teeth is presented. For the purpose of obtaining a satisfactory final outcome of an esthetic direct restoration, it is crucial to standardize either margin preparation design and dentin and enamel layer thickness. Leaving too much space for the final translucent layer may lead in fact to “low value—gray” restorations if not correctly managed. The most common tool used to check layer thickness is the sagittal silicone index, which is reliable but involves planning; therefore, it requires two stages appointments. In this clinical case, a novel procedure is used to prepare, to model and to check thickness of composite shades in a single appointment, thus providing a symmetric esthetic outcome. A healthy 21-year-old woman referred to our dental office for the esthetic rehabilitation of both maxillary central incisors. The correct composite bilateral and symmetric layer thickness management provided a predictable esthetic outcome of the restorations. The main objective of this case presentation is to describe a novel technique that is able to save chair-time and dental laboratory costs during direct restorations in anterior teeth.
Collapse
|